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Finding the Fourth Proportional to 386,200.35, 579,464.55 and 186,417.90

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Solution

The fourth proportional to 386,200.35, 579,464.55 and 186,417.90 is: 279,706.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,200.35 : 579,464.55 = 186,417.90 : x
  2. Step 2: Convert to fraction form
    386,200.35/579,464.55 = 186,417.90/x
  3. Step 3: Cross multiply
    386,200.35x = 579,464.55 × 186,417.90
  4. Step 4: Simplify right side
    386,200.35x = 108,022,564,535.45
  5. Step 5: Solve for x
    x = 108,022,564,535.45/386,200.35
  6. Step 6: Final answer
    x = 279,706.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.